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The evolutionary and ecological benefits of asteroid and comet impacts

Cockell, Charles S. and Bland, Philip A. (2005). The evolutionary and ecological benefits of asteroid and comet impacts. Trends in Ecology and Evolution, 20(4) pp. 175–179.

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Commonly viewed solely as agents of destruction, asteroid and comet impact events can also have a beneficial influence on processes from the molecular to the evolutionary scale. On the heavily bombarded early Earth, impacts might have delivered and caused the synthesis of prebiotic compounds that eventually led to life. At the organismal and ecosystem level, impact events can provide new habitats through the shock processing of target materials and by enhancing water availability, such as within intracrater lakes. At the evolutionary level, by destroying entire groups of organisms, impacts might have been instrumental in enabling the rise of new groups, such as the dinosaurs and mammals. Here, we synthesize the emerging literature on the beneficial effects of impacts to provide a novel perspective on these extraterrestrial agents of biological change.

Item Type: Journal Article
ISSN: 0169-5347
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 5193
Depositing User: Users 6872 not found.
Date Deposited: 01 Aug 2006
Last Modified: 14 Jan 2016 16:12
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